//
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// Licensed under the MIT license.
//
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// Bot Framework Emulator Github:
// https://github.com/Microsoft/BotFramwork-Emulator
//
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// All rights reserved.
//
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// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
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// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
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import * as React from 'react';

import * as styles from './insetShadow.scss';

export type InsetShadowOrientation = 'top' | 'bottom' | 'left' | 'right';

export interface Props {
  orientation: InsetShadowOrientation;
}

export class InsetShadow extends React.Component<Props> {
  public render() {
    const { orientation } = this.props;
    if (!orientation) {
      throw new Error('<InsetShadow /> requires an "orientation" prop to be passed in!');
    }

    let shadowClassName = '';
    switch (orientation) {
      case 'top':
        shadowClassName = styles.top;
        break;

      case 'bottom':
        shadowClassName = styles.bottom;
        break;

      case 'left':
        shadowClassName = styles.left;
        break;

      case 'right':
        shadowClassName = styles.right;
        break;

      default:
        return null;
    }

    return <div className={[styles.insetShadow, shadowClassName].join(' ')} aria-hidden="true" />;
  }
}
